Start delay for standalone activities

[laurakwhit]

Description & motivation 💭

• Adds start_delay input to "Start Standalone Activity" form.
• Displays a clock icon with a "Delayed" tooltip in the status badge.
• Shows an "Execution Time" time in the activity details section if there is a start delay on the workflow.
• Shows "Start Delay" duration under "Timing and Progress".

Screenshots (if applicable) 📸

List view	Details view

Start form	Update form

Design Considerations 🎨

Testing 🧪

How was this tested 👻

• Manual testing
• E2E tests added
• Unit tests added

Steps for others to test: 🚶🏽‍♂️🚶🏽‍♀️

Run temporal server from a local build

1. Ensure you have cloned the temporal repo
2. Make sure StartDelayEnabled is set to true
3. Run make bins and make start
4. Running temporal server from a local build does not create the namespace, run temporal operator namespace create --namespace default

Run the UI against a local build of temporal server

1. Checkout the DT-3985-saa-start-delay branch in the UI repo
2. Make sure the API version here is the same as the version here.
3. cd server/ && make build
4. cd .. && pnpm dev:local-temporal

Run some sample workflows in the canary-go repo

1. Run make bins and ./temporal-canary start

---

Go to "Start Standalone Activity"

• Verify "Start Delay" input is visible and can be added

Go to a running activity

• Verify "Start Delay" is disabled with a tooltip

Go to a delayed activity

• Update the activity "Start Delay" value and verify it works as expected

In the list view and details view for an activity with "Start Delay" defined

• Verify the status has a clock icon and tooltip that says "Delayed"

With StartDelayEnabled set to false

• Verify Start Delay input is not visible
  • on the "Start Standalone Activity" form
  • on the update form for a running activity

Checklists

Draft Checklist

Merge Checklist

Issue(s) closed

DT-3985

Docs

Any docs updates needed?

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Project	Deployment	Actions	Updated (UTC)
holocene	Ready	Preview, Comment	Jul 21, 2026 1:48am